Concrete placement apparatus



Oct. 14, 1941.- c. JACKSON CONCRETE PLACEMENT APPARATUS Filed Nov. 30, 1959 INVENTOR. BY 60/W/7/ 4/46/(60/7 1 AORNEY8 A I Patented Oct. 14, 1941 UNITED STATES PATENT ()FFICE 12 Claims.

This invention relates to improvements in concrete placement apparatus.

The main objects of this invention are:

First, to provide a machine or apparatus for the placement of concrete such as pavement, concrete slabs, the walls of ditches, conduits, or the like which is highly effective for the rapid and effective placement of concrete having relatively large and irregular aggregate such as crushed rock with a relatively small amount of fines, particularly where such concrete mixture is of low water. content.

Second, to provide a machine or apparatus of this character which is well adapted for the placement of concrete in which the practice is followed of first laying a foundation bed, then placing reinforcing thereon, and then placing a second layer of concrete.

Third, to provide a machine or apparatus for the placement of concrete which may be operated with considerable speed and which has a large capacity, at the same time being highly efficient.

Objects relating to details and economies of the invention will appear from the description to follow. The invention is defined and pointed out in the claims.

Preferred embodiments of the invention are illustrated in the accompanying drawing, in which:

Fig. 1 is a fragmentary view in longitudinal section on a line corresponding to line |l of Fig. 2 of a concrete placement machine embodying my invention.

Fig. 2 is a fragmentary transverse section on line 2-2 of Fig. 1.

Fig. 3 is a fragmentary sectional View of one of the auxiliary vibratory members.

Fig. 4 is a fragmentary sectional view corresponding to that of Fig. 2 showing adaptations to a somewhat different specification from that disclosed in Figs. 1 and 2.

My present invention is an adaptation of and improvement upon the structure of my application for Letters Patent filed June 12, 1939, Serial No. 278,594. In the embodiment of my invention illustrated, I represents the main carriage of a paving machine provided with a reciprocating screed 2 having a shoe 3 and an upstanding face plate 4 adapted to support a substantial amount of concrete indicated at 5 in the drawing.

The screed is provided with wings 6 at the ends thereof which overhang the side forms I which serve as tracks for the carrying wheels 8 of the main carriage. The screed reciprocates on the forms and is operated by suitable pitmans conventionally shown at 9 and supported by the thrust arms In for advancement with the main carriage.

I provide an auxiliary'vibratory element carrying frame which in this embodiment consists of the side members I2 and a tubular transverse member l3 connecting the same, the side members 12 being mounted on the push bars M which are pivoted on the main frame at 15.

The auxiliary frame is provided with wheeled supports l6 provided with wheels I! which travel on the side forms. Means for adjusting the Wheeled supports and thereby raising and lowering the auxiliary frame are-designated generally by the numeral l8. This adjusting means is described in detail in my copending application for Letters Patent, Serial No. 234,918 and I therefore do not illustrate or describe the same in detail herein. It'will be'understoodlthat tilting'the supports 16 on their pivots 19 will raise and lower the auxiliary frame and thus raise thevibratory element carried thereby, which I Will now describe. I

My improved vibratory element consists of a pair of elongated vibratory members 20 and 2| arranged in horizontally spaced relation and rigidly connected to vibrate as a unit by means of a plurality of tie members 22. These tie members serve to connect the members 20 and 2| in spaced parallel relation so that they vibrate as a unit. The'vibrating means, preferably an electric motor 23, conventionally shown in the drawing, is mounted upon tie members 24 which serve as supporting brackets for themotor. The shaft 25 of the motor is disposed with its axis transversely to the axis of the vibrating members 20 and 2| and is provided with an unbalancing weight 26 so that high frequency vibrations are imparted to the vibratory element.

The Vibratory element is also provided with a plurality of blade-like auxiliary vibratory mem bers 21 which are disposed in transverse relation to the members 20 and 21 to depend therefrom and preferably to extend substantially in advance and to the rear thereof as shown in Fig. 1.

The members 20 and 2| are preferably sections of tubing of suitable diameter while the auxiliary members 21 areformed of steel plates and are rigidly secured to the members 2| and 22 by means of clamps 28. r The members 2! are disposed in spaced parallel relation and are preferably adjustably and detachably connected to the members 20 and 2| which permits spacing them as may be desired and also the operation of the machine without them if they are not desired.

It will be understood that I use the term auxiliary vibratory members as a matter of convenience in distinguishing the members 20, 2| and 21.

The members 2'! are preferably provided with shoe-like enlargements 29 on their lower edges, these enlargements being formed of pieces of pipe or tubing longitudinally slit to'receive the edges -of the plate or blade-like members, the edges of the slit being welded to the sides of the plate. The forward ends of the members are turned upwardly to facilitate the passage through the material treated and to prevent theirengagement with reinforcing, as indicated at 30.

The vibratory unit is supported for free vibratory action by means of the flexible non-extensible hangers 3| which are suspended from the brackets 32 carried by the member [3 of the supporting frame. These brackets may be rotatably adjusted on the frame member I3. The lower ends of the hangers are engaged with certain of the tie members. The brackets are provided with forwardly projecting arms 33 to'which the flexible non-extensible draft members 34 are connected. This permits free vibratory action of the vibratory element in its adjusted positions.

The vibratory members 20 and 2| are supported so that the material being treated may pass between and around them while the members are submerged in a mass of concrete supported in front of the screed. Certain engineering specifications call for the placement of a foundation layer of concrete upon which the reinforce 20 is then placed and a second layer of concrete is placed upon the foundation layer over the reinforcing.

My improved machine is highly satisfactory for the placement of pavement of that character and the vibratory element may be adjusted so that the shoe portions of the auxiliary vibratory members will engage or travel upon the reinforce, the reinforce being thus subjected to vibrations as well as the concrete mass so that all voids around the reinforce are eliminated. By placing the axis of the unbalanced vibratory rotor transversely of the vibratory element as is illustrated, the auxiliary vibratory members are vibrated in orbital paths and the whole mass between them effectively vibrated, the mass at the same time being subject to the vibrations of the members 20 and 2| around and between which the material vibrated can freely pass.

In Fig. 4, I have illustrated the members 21 as being substantially wider than shown in Figs. 1 and 2, it being entirely practical to provide sets of varying widths to meet various specifications so far as thickness of the foundation and top surface is concerned and the consequent placement of the reinforce material.

However, it should be understood that the machine of my invention is a very desirable one for use in placement of concrete slabs generally and particularly where coarse irregular aggregate and low fines" content are present. Further, the machine of my invention is of very large capacity, at the same time being highly eflicient.

I have illustrated and described my improvements in an embodiment which I have found very satisfactory commercially. I have not attempted to illustrate or describe various adaptations and modifications as it is believed that such adaptations and modifications will be readily understood by those skilled in the art to which my invention relates.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. In a machine of the class described, the combination with a supporting frame mounted for vertical adjustment, of a horizontally disposed vibratory element comprising horizontally spaced elongated submersible members of rounded section, a plurality of tie members for said vibratory members whereby they are rigidly connected as a unit, said members being spaced so as to permit free passage of material treated therebetween, a plurality of auxiliary vibratory blade members rigidly and detachably connected to said elongated members in transverse relation thereto andto extend downwardly therefrom and also to extend forwardly and rearwardly thereof and in spaced parallel relation to each other, said auxiliary members being provided on their lower edges with enlargements of rounded section curved upwardly at their forward ends, a vibrating means for said vibratory element comprising an unbalanced rotor mounted on said elongated vibratory members with its axis in transverse relation thereto and in parallel relation to said auxiliary vibratory members, and means for supporting said vibratory element from said supporting frame permitting vibration thereof and com prising flexible non-extensible hangers and flexible non extensible draft members.

2. In a machine of the class described, the combination with a supporting frame mounted for vertical adjustment, of a horizontally disposed vibratory element comprising horizontally spaced elongated submersible members of rounded section, a plurality of tie members for said vibratory members whereby they are rigidly connected as a unit, said members being spaced so as to permit free passage of material treated therebetween, a plurality of auxiliary vibratory blade members rigidly and detachably connected to said elongated members in transverse relation thereto and to extend downwardly therefrom said auxiliary vibratory members being of subtantial width and length and being substantially spaced relative to one another so as to provide therebetween a plurality of pockets of substantial volume for the reception of material treated,

a vibrating means for said vibratory element comprising an unbalanced rotor mounted on said elongated vibratory members with its axis in transverse relation thereto and in parallel relation to said auxiliary vibratory members, and means for supporting said vibratory element from said supporting frame permitting universally directional vibration thereof and comprising flexible non-extensible hangers and flexible nonextensible draft members.

3. In a machine of the class described, the combination with a supporting frame mounted for vertical adjustment, of a horizontally disposed vibratory element comprising horizontally spaced elongated submersible members of rounded section, a plurality of tie members for said vibratory members whereby they are rigidly connected as a unit, said members being spaced so as to permit free passage of material treated therebetween, a plurality of depending auxiliary vibratory blade members connected to said elongated members in transverse relation thereto in spaced parallel relation to each other said auxiliary vibratory members being of substantial width and length and being substantially spaced relaassent tive to one another so as to provide therebetween a plurality of pockets of substantial volume for the reception of material treated, a vibrating means for said vibratory element, and means for supporting said vibratory element from said supporting frame permitting vibration thereof.

4. In a machine of the class described; the combination with a supporting unit provided with means for vertical adjustment, of a horizontally disposed vibratory element comprising horizontally spaced elongated submersible members rigidly connected as a unit, a plurality of auxiliary vibratory blade members rigidly secured to said elongated vibratory members to depend therefrom and spaced longitudinally thereof, said auxiliary members having enlarged shoe portions at their lower edges, means for supporting said vibratory element on said supporting unit permitting vibration thereof, and vibrating means for said vibratory element comprising an unbalanced rotor mounted on said vibratory element with its axis in transverse relation thereto and in parallel relation to said auxiliary vibratory members.

5. In a machine of the class described, the combination of a supporting frame, a horizontally disposed vibratory element mounted for vertical adjustment and comprising horizontally spaced elongated submersible members rigidly connected as a unit, a plurality of depending auxiliary vibratory blade members rigidly and de tachably secured to said elongated members transversely thereof and in spaced relation to each other, said auxiliary members being provided on their lower edges with enlargements, a vibrating means for said vibratory element comprising an unbalanced rotor mounted on said elongated vibratory members with its axis in transverse relation thereto and in parallel relation to said auxiliary vibratory members, and means for supporting said vibratory element from said supporting frame permitting vibration thereof.

6. In a machine of the class described, the combination of a supporting frame, a horizontally disposed vibratory element mounted for vertical adjustment and comprising horizontally spaced elongated submersible members rigidly connected as a unit, a plurality of depending auxiliary vibratory members of substantial vertical width secured to said elongated members transversely thereof and in spaced relation to each other said auxiliary vibratory members being of substantial width and length and being substantially spaced relative to one another so as to provide therebetween a plurality of pockets of substantial volume for the reception of material treated, and vibrating means for said vibratory element comprising means for supporting said vibratory element from said supporting frame permitting free vibration relative to said frame.

'7. In a machine of the class described, the combination of a horizontally disposed vibratory element supported to permit vibrating thereof and comprising horizontally spaced elongated submersible members rigidly connected as a unit, a plurality of auxiliary vibratory blade members secured to said elongated vibratory members to vibrate therewith and depending therefrom in spaced parallel relation to each other said auxiliary vibratory members being of substantial width and length and being substantially spaced relative to one another so as to provide therebetween a plurality of pockets of substantial volume for the reception of material treated, and vibrating means for said vibratory element com prising an unbalanced rotor mounted on said vibratory element with its axis in transverse relation thereto and in parallel relation to said auxiliary vibratory members.

8. In a machine of the class described, the combination of a horizontally disposed vibratory element supported to permit vibrating thereof and comprising horizontally spaced elongated submersible members rigidly connected as a unit, a plurality of auxiliary vibratory blade members secured to said elongated vibratory members to vibrate therewith and depending therefrom in spaced parallel relation to each other said auxiliary vibratory members being of substantial width and length and being substantially spaced relative to one another so as to provide therebetween a plurality of pockets of substantial volume for the reception of material treated, and vibrating means for said vibratory element.

9. In a machine of the class described, the combination of a horizontally disposed vibratory element supported to permit vibrating thereof and comprising horizontally spaced elongated submersible members rigidly connected as a unit, a plurality of auxiliary vibratory blade members secured to said elongated vibratory members to vibrate therewith and depending therefrom in spaced parallel relation to each other, said auxiliary members having longitudinally extending enlargements on their lower edges, and vibrating means for said vibratory element.

10. In a machine of the class described, the

' combination of a horizontally disposed submersible elongated vibratory element, a plurality of auxiliary vibratory elements of substantial vertical width mounted on said elongated vibratory element to depend therefrom in spaced parallel relation said auxiliary vibratory elements being of substantial width and length and being substantially spaced relative to one another so as to provide therebetween a plurality of pockets of substantial volume for the reception of material treated, and means for vibrating said vibratory element comprising an unbalanced rotor mounted on said vibratory element with its axis in transverse relation thereto.

11. In a machine of the class described, the combination of a horizontally disposed submersible elongated vibratory element, a plurality of auxiliary vibratory elements of substantial vertical width mounted-on said elongated vibratory element to depend therefrom in spaced parallel relation said auxiliary vibratory elements being of substantial width and length and being substantially spaced relative to one another so as to provide therebetween a plurality of pockets of substantial volume for the reception of material treated, and means for vibrating said vibratory element.

1 12. In a machine of the class described, the combination of a horizontally disposed submersible elongated vibratory element, a plurality of auxiliary vibratory elements of substantial ver-' tical width mounted on said elongated vibratory element to depend therefrom in spaced parallel relation and provided with enlargements on their lower edges, and means for vibrating said vibratory element.

CORWILL JACKSON. 

